Review Question - QID 218559

A 23-year-old active duty soldier is referred to your clinic. He notes that four years ago during basic training he sustained an ankle sprain, and has had multiple recurrent sprains since. On physical examination, you note fullness about the ankle, and he states that he has pain when walking on uneven or soft terrain. There is increased laxity when compared to the contralateral side with ankle drawer testing in dorsiflexion, but not in plantarflexion. Attenuation or injury to which of the labeled structures in Figure A is most likely responsible for your physical examination findings?